Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

See “Migrating from disk-based to server-based fencing in an online cluster”

on page 61.

To migrate from server-based fencing to disk-based fencing

Make sure system-to-system communication is functioning properly.

Make sure that the SF Oracle RAC cluster is online.

# vxfenadm -d

For example, if SF Oracle RAC cluster uses server-based fencing:

I/O Fencing Cluster Information:

================================

Fencing Protocol Version: 201

Fencing Mode: Customized

Fencing Mechanism: cps

Cluster Members:

* 0 (galaxy)

1 (nebula)

RFSM State Information:

node 0 in state 8 (running)

node 1 in state 8 (running)

Make sure that you performed the following preparatory tasks to configure

disk-based fencing:

■ Identifying disks to use as coordinator disks

■ Setting up coordinator disk group

■ Creating I/O configuration files

See the Veritas Storage Foundation for Oracle RAC Installation and

Configuration Guide for the procedures.

Create a new /etc/vxfenmode.test file with the fencing configuration

changes such as the scsi3 disk policy information.

Refer to the sample vxfenmode files in the /etc/vxfen.d folder.

From any node in the SF Oracle RAC cluster, start the vxfenswap utility:

# vxfenswap -g diskgroup [-n]

Review the message that the utility displays and confirm whether you want

to commit the change.

Overview of Veritas Storage Foundation for Oracle RAC

About preventing data corruption with I/O fencing